Now Storm no concept like 'shared memory' you should use external resources. As a reference, you can take a look at `storm-redis` https://github.com/apache/storm/tree/master/external/storm-redis.
2016-07-13 21:21 GMT+08:00 Stephen Powis <spo...@salesforce.com>: > You'd need to use some external data store (such as redis) to maintain > state that exists across multiple JVMs > > On Wed, Jul 13, 2016 at 4:22 AM, jimmy tekli <jimmyte...@hotmail.com> > wrote: > >> Hello , >> I developed a java project based on the storm topology that process >> incoming tuples in a certain way.I tested it locally and it worked >> perfectly in the context of streaming tuples of course. My topology is >> formed of one spout and three bolts.In my code I used Data Structures >> (such as HashMaps,linkedHashmap and TreeMap) to store some information >> concerning the tuple's processing and I declared them static in the >> topology builder class so they could be shared by all the bolts because >> they need to accessed and varied by them frequently. The problem is that >> when i deployed it over a remote cluster these static attributes weren't >> visible (shared ) by the different bolts (I read about it online and I >> concluded because of multiple JVMs). My question is if there is a certain >> concept concerning "shared memory" in Apache Storm where we can store these >> DataStructures for them to be shared and accessed by all the bolts at any >> given time. >> >> thanks in advance for your help. >> > >
